Mark scheme (Foundation) : Paper 1 - June 2019

GCSE

CHEMISTRY

8462/1F

Paper 1 Foundation Tier

Mark scheme

June 2019

Version: 1.0 Final

*196G8462/1F/MS*

MARK SCHEME ¨C GCSE CHEMISTRY ¨C 8462/1F ¨C JUNE 2019

Mark schemes are prepared by the Lead Assessment Writer and considered, together with the relevant

questions, by a panel of subject teachers. This mark scheme includes any amendments made at the

standardisation events which all associates participate in and is the scheme which was used by them in

this examination. The standardisation process ensures that the mark scheme covers the students¡¯

responses to questions and that every associate understands and applies it in the same correct way.

As preparation for standardisation each associate analyses a number of students¡¯ scripts. Alternative

answers not already covered by the mark scheme are discussed and legislated for. If, after the

standardisation process, associates encounter unusual answers which have not been raised they are

required to refer these to the Lead Examiner.

It must be stressed that a mark scheme is a working document, in many cases further developed and

expanded on the basis of students¡¯ reactions to a particular paper. Assumptions about future mark

schemes on the basis of one year¡¯s document should be avoided; whilst the guiding principles of

assessment remain constant, details will change, depending on the content of a particular examination

paper.

Further copies of this mark scheme are available from .uk

Copyright ? 2019 AQA and its licensors. All rights reserved.

AQA retains the copyright on all its publications. However, registered schools/colleges for AQA are permitted to copy material from this booklet

for their own internal use, with the following important exception: AQA cannot give permission to schools/colleges to photocopy any material that

is acknowledged to a third party even for internal use within the centre.

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MARK SCHEME ¨C GCSE CHEMISTRY ¨C 8462/1F ¨C JUNE 2019

Information to Examiners

1. General

The mark scheme for each question shows:

? the marks available for each part of the question

? the total marks available for the question

? the typical answer or answers which are expected

? extra information to help the Examiner make his or her judgement

? the Assessment Objectives, level of demand and specification content that each question is intended

to cover.

The extra information is aligned to the appropriate answer in the left-hand part of the mark scheme and

should only be applied to that item in the mark scheme.

At the beginning of a part of a question a reminder may be given, for example: where consequential

marking needs to be considered in a calculation; or the answer may be on the diagram or at a different

place on the script.

In general the right-hand side of the mark scheme is there to provide those extra details which confuse

the main part of the mark scheme yet may be helpful in ensuring that marking is straightforward and

consistent.

2. Emboldening and underlining

2.1

In a list of acceptable answers where more than one mark is available ¡®any two from¡¯ is used, with

the number of marks emboldened. Each of the following bullet points is a

potential mark.

2.2

A bold and is used to indicate that both parts of the answer are required to award the mark.

2.3

Alternative answers acceptable for a mark are indicated by the use of or. Different terms in the

mark scheme are shown by a / ; e.g. allow smooth / free movement.

2.4

Any wording that is underlined is essential for the marking point to be awarded.

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MARK SCHEME ¨C GCSE CHEMISTRY ¨C 8462/1F ¨C JUNE 2019

3. Marking points

3.1

Marking of lists

This applies to questions requiring a set number of responses, but for which students have

provided extra responses. The general principle to be followed in such a situation is that ¡®right +

wrong = wrong¡¯.

Each error / contradiction negates each correct response. So, if the number of error /

contradictions equals or exceeds the number of marks available for the question, no marks can be

awarded.

However, responses considered to be neutral (indicated as * in example 1) are not penalised.

Example 1: What is the pH of an acidic solution?

[1 mark]

Student

Response

1

2

3

green, 5

red*, 5

red*, 8

Marks

awarded

0

1

0

Example 2: Name two planets in the solar system.

[2 marks]

Student

1

2

3.2

Response

Neptune, Mars, Moon

Neptune, Sun, Mars,

Moon

Marks awarded

1

0

Use of chemical symbols / formulae

If a student writes a chemical symbol / formula instead of a required chemical name, full credit can

be given if the symbol / formula is correct and if, in the context of the question, such action is

appropriate.

3.3

Marking procedure for calculations

Marks should be awarded for each stage of the calculation completed correctly, as students are

instructed to show their working. Full marks can, however, be given for a correct numerical

answer, without any working shown.

3.4

Interpretation of ¡®it¡¯

Answers using the word ¡®it¡¯ should be given credit only if it is clear that the ¡®it¡¯ refers to the correct

subject.

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MARK SCHEME ¨C GCSE CHEMISTRY ¨C 8462/1F ¨C JUNE 2019

3.5

Errors carried forward

Any error in the answers to a structured question should be penalised once only.

Papers should be constructed in such a way that the number of times errors can be carried forward

is kept to a minimum. Allowances for errors carried forward are most likely to be restricted to

calculation questions and should be shown by the abbreviation ecf in the marking scheme.

3.6

Phonetic spelling

The phonetic spelling of correct scientific terminology should be credited unless there is a possible

confusion with another technical term.

3.7

Brackets

(¡­..) are used to indicate information which is not essential for the mark to be awarded but is

included to help the examiner identify the sense of the answer required.

3.8

Allow

In the mark scheme additional information, ¡®allow¡¯ is used to indicate creditworthy

alternative answers.

3.9

Ignore

Ignore is used when the information given is irrelevant to the question or not enough to gain the

marking point. Any further correct amplification could gain the marking point.

3.10 Do not accept

Do not accept means that this is a wrong answer which, even if the correct answer is given as

well, will still mean that the mark is not awarded.

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